diff --git a/mboxd_msg.h b/mboxd_msg.h
new file mode 100644
index 0000000..44a2f91
--- /dev/null
+++ b/mboxd_msg.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2016 IBM
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef MBOXD_MSG_H
+#define MBOXD_MSG_H
+
+#define NO_BMC_EVENT	false
+#define SET_BMC_EVENT	true
+
+struct mbox_msg {
+	uint8_t command;
+	uint8_t seq;
+	uint8_t args[MBOX_ARGS_BYTES];
+	uint8_t response;
+};
+
+union mbox_regs {
+	char raw[MBOX_REG_BYTES];
+	struct mbox_msg msg;
+};
+
+int set_bmc_events(struct mbox_context *context, uint8_t bmc_event,
+		   bool write_back);
+int clr_bmc_events(struct mbox_context *context, uint8_t bmc_event,
+		   bool write_back);
+int dispatch_mbox(struct mbox_context *context);
+int init_mbox_dev(struct mbox_context *context);
+void free_mbox_dev(struct mbox_context *context);
+
+#endif /* MBOXD_MSG_H */